CVE-2021-27890

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

10.59% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 95.4% of scored records. A rank, not a probability.

NVD base score

8.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2021-03-15 17:04Z5 YR AGO

Last updated

2024-08-03 21:33Z2 YR AGO

Reserved

2021-03-02

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-89Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')Base

Data version

5.1

Document digest

d009216c7ea752b0baecdd3ba8f153788f926f7e84c8405cd47a02436cab3def

• github.comhttps://github.com/mybb/mybb/security/advisories/GHSA-r34m-ccm8-mfhqx_refsource_MISC
• packetstormsecurity.comhttp://packetstormsecurity.com/files/161908/MyBB-1.8.25-Remote-Command-Execution.htmlx_refsource_MISC
• blog.sonarsource.comhttps://blog.sonarsource.com/mybb-remote-code-execution-chainx_refsource_MISC